Ball forging machine



July 3, 1934. w K, COATES 1,965,489

BALL FORGING MACHINE Filed Dec. 5, 1933 J/aZ/a 06 K 6262 [66 PatentedJuly 3, 1934 UNITED STATES;

PATENT OFFICE 2 Claims.

The invention relates to a ball forging machine and more especially toimprovements over the subject matter of Letters Patent No. 1,522,416,dated January 6, 1925.

The primary object of the invention is the provision of a machinewherein the dies for forming balls from hot cubes of metal are mountedin a novel manner so that the uneven cubes can be rolled and forged intoa ball without cutting into the units, the dies being permitted lateral,

front and back displacement, which permits functioning for the trueforging operation.

Another object of the invention is the provision of a machine of thischaracter, wherein the dies for the forging or rolling of balls are inthe form of segments connected in a manner for hinging action and suchdies are arranged in position with the roll that carries the units orhot cubes to prevent the roll rubbing directly on the dies 0 andsustaining proper position at all times, the

dies being readily adjustable and their construction being animprovement over Letters Patent No. 1,522,416, dated January 6, 1925.

A further object of the invention is the provision of a machine of thischaracter, wherein the roll is mounted upon its drive shaft in a novelmanner in that such roll has a wobbling action which enables the forgingor shaping of hot cubes of metal into ball formation.

A still further object of the invention is the provision of a machine ofthis character which is extremely simple in construction, thoroughlyreliable and efficient in its purposes, and inexpensive to manufacture.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described in detail, illustrated in theaccompanying drawing, which discloses the preferred embodiment of theinvention,

and pointed out in the claims hereunto appended.

In the accompanying drawing: Figure 1 is a vertical sectional viewthrough a machine constructed in accordance with the invention.

Figure 2 is an enlarged fragmentary sectional view on the line 22 ofFigure 1.

Figure 3 is a sectional view on the line 33 of Figure 1.

Similar reference characters indicate corresponding parts throughout theseveral views in the drawing.

Referring to the drawing in detail, A designates generally the body ofthe machine and the same may be of any approved construction, having thecircular chamber 5 in which is arranged the roll 6, the latter beingprovided with the peripheral groove '7, it being half-circular in crosssection, and this roll contains a squared center opening 8 foraccommodating a squared hub 9, the latter being slightly less in sizethan the hole or opening 8 and this hub is formed on a turning shaft(not shown).

About the roll 6 for a distance of its major diameter is a series ofsegmental-shaped dies 10, these at their confronting faces with respectto the roll 6 being provided with half-circular grooves 11 alike to thegroove 7 in the roll 6. Counterseated in opposite sides of the dies 10at their ends next to each other are connecting links 12 receiving thepivots or hinge pintles 13 which are engaged in the ends next to eachother of said dies 10 so that the dies are linked with each other forchain-like flexing thereof.

Disposed midway of the length of each die 10, between the same and thewall of the chamber 5, is a coiled compression spring 14, its oppositeends being seated in cup-like bearings or seating members 15 and 16,respectively, the latter having swiveled therein an adjusting screw 17which is threaded in the wall of the chamber 5 and projects without thebody A, this projected end being formed with a wrench-engaging head 18so that it can be manually turned for varying the tension or compressionof the spring 14, the bearing or seating member 15 being formed with alug 19 which is countersunk into the die 10 next thereto.

Mounted in the body A, at the ends of the series of dies 10, are slackbolts 20 which hold the dies within the chamber 5 and these bolts fit inrecesses 21 in the ends of the dies next thereto. Each hot cube of metal22 is delivered through the opening 23 at the uppermost portion of thewall of the chamber 5 for entrance of such cube between the roll 6 andthe dies 10, the roll being rotatable clockwise so that the cube 22 willpass through the grooves 7 and 11 confronting each other in the saidroll and dies, so that the cube will be rolled or forged into ballshape. It is also to be understood that the roll 6 is of less width thanthe chamber 5 so that the said roll will have a wobbling action on thehub 9 and the coaction of the dies with this roll permits the rollingand forging of uneven blanks or units into balls without cutting intothe blanks or units, the dies being permitted to move laterally,forwardly and backwardly so as to accommodate these to the work and alsoto sustain proper position at all times.

What is claimed is:

1. A ball forming machine comprising a body forming a circular chamber,a roll within said chamber and having a peripheral groove halfcircularin cross section and also provided with a squared center opening, asquared hub received in said squared center opening, the hub beingslightly less in size than the squared center opening, a series ofsegmental-shaped dies within the chamber concentrically With respect tothe roll to confront the periphery of the latter, the confronting iacesof the said dies being provided with half-circular grooves alike to theperipheral groove of the roll, links connecting the dies of the series,coiled compression springs imposed against said dies, and means carriedby the body and acting against the springs for varying the tensionthereof, the dies being of less Width than the chamber.

2. A ball forming machine comprising a body forming a circular chamber,a roll within said chamber and having a peripheral groove half-circularin cross section and also provided with a squared center opening, asquared hub received in said squared center opening, the hub beingslightly less in size than the squared center opening, a series ofsegmental-shaped dies within the chamber concentrically with respect tothe roll to confront the periphery of the latter, the confronting facesof the said dies being provided with half-circular grooves alike to theperipheral groove of the roll, links connecting the dies of the series,coiled compression springs imposed against said dies, means carried bythe body and acting against the springs for varying the tension thereof,the dies being of less width than the chamber, and means in the chamberto prevent undue circumferential movement of said series of dies.

WALLACE K. COATES.

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